Frederick a



(No Model.)

F. A. SWAN & G. B. BOSWORTH.

ELECTRIC GUT OUT.

Patented Mar. 20,1883.

Fig.5

\A/ITNEEEES INVENTURE UNITED STATES PATENT GEEIcE.

FREDERICK A. SWAN AND CHARLES E. BOSWVORTH, OF BOSTON, MASS.

ELECTRlC CUT-OUT.

SPECIFICATION forming part of Letters Patent No. 274,151, dated March 20, 1883.

Application filed July 17, 1882. (No model.)

To all whom it may concern:

Be it known that we, FREDERICK A. SWAN and CHARLES B. Boswomn, of Boston, in the county of Suffolk and State of Massachusetts, have invented a certain new and useful Electric Cut-Out and Resistance Substitute, of which the following is a specification.

Our invention relates to that class of electric cut-outs in which it is desirable to cut out a certain portion or branch of wires and notto interfere with the main line, the object being to so arrange the cut-out device that the operating of the cut-out substitutes in the line a resistance equivalent to the amount of resistance existing in the portion cut out. Weattain theseobjects bythe mechanism illustrated in the accompanying drawings, in which- Figure l is a diagram illustrating our devices. Fig. 2 shows the same in part, the movable part of the cut-out being represented in the position which it occupies when the light and its wires are cut out of circuit. Fig. 3 is a view showing a vertical section taken on line X X of Fig. 1, and a perspective view of a part of the top of the cut-out board.

13 represents an electric light of ordinary construction, supplied with circuit-wires B B, which connect with the binding-posts B B. The wires L and L are the line-wires which counect with the binding-posts L L, one of which, L, is connected by a spring-plate, S, to an insulated bed-plate, C, while the other post, L is connected by a spring-plate, S, to the insulated bed-plate O. The bed-plates C and (J are shaped as shown, and attached to a block. E, which slides in the bed-piece A. The block E is held in position by the hook-pawl H, which engages with the projection E on the slide E. The spring F is at tension, one end acting upon E on the sliding block E, while the other is tixed to the bed-piece A, so that the tendency is to cause the block E to slide in the direction of the arrow R when released from the hook-pawl H. The motion of the hook-pawl H is controlled by the electro-magnet M, acting through the armature H, the electromagnet M being charged by the wire D (connected to the light-wire B and the wire D, contact-breaker D D D D and wire D (connected to the light-wire 13'.) Then the contact-breaker is open, as shown in the draw ings, Fig. 1, the current passes to the light and does not affect-the magnet M 3 but if the contact at D D is made the magnet M acts and withdraws the hook-pawl H, thus releasing the block E and allowing it to be thrown by the spring F, so as to occupy the position shown in Fig. 2.

\Vhen it is desirable to have the light and its wires B and B in circuit the cut-out device is in the positionshowu in Fig. 1, in which case the current passes from the line-wire L through post L spring-plate S, bed-plate O, spring-plate S", post B, and wire B to light; then through wire B post B spring-plate S bed-plate U, spring-plate S, and post L to linewire L.

We will now describe our substitute resistance device, which is shown in Fig. 3 and partly in Fig. 2.

Then the light and its wires are cut out the slide E occupies the position shown in Figs. 2 and 3; the line spring-plates S and S resting on the bed-plates 0 and 0 respectively, the plate 0 being joined to the vertical plate T, Fig. 3, and the plate 0 to the vertical plate T, so that a connection of the plates T and T, Fig. 3, will complete a circuit between the line-wires L and L (See Fig. 2.) This connection is made as follows:

K and K, Fig. 3, are two brushes resting on the plates T T, as shown, the brushes K and K being each provided with a metal bracket-piece, N N, the two brackets N and N being connected by a piece, P, of comparatively great resistance, its actual resistance being equal to the resistance of the lightwii'es, the light itself, and the connecting parts, so that the cutting out of the light does not afi'ect the total resistance on the line.

I is a contact-closer, which may be used when it is not desirable to introduce additional resistance into the line.

We claim- In an electric cut-out and resistance device, the combination ofthe cut-out mechanism, consisting of the electromagnet M, catch H, and switch-block E, with the brushes K K, and resistance-piece P, all operating together substantially as described, and for the purpose set forth.

- FREDERICK A. SWAN.

CHARLES B. BOSWORTH.

Witnesses HELEN M. FEEGAN, \VILLIAM EosoN. 

